Flash Flood Warning 43, NWS Salt Lake City, UT

283 
WGUS75 KSLC 270009
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
609 PM MDT FRI AUG 26 2011

UTC017-025-270315-
/O.CON.KSLC.FF.W.0043.000000T0000Z-110827T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-GARFIELD UT-
609 PM MDT FRI AUG 26 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR SOUTH
CENTRAL GARFIELD AND NORTH CENTRAL KANE COUNTIES...

AT 606 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT 2-3 INCHES OF RAINFALL HAS FALLEN OVER THE CANAAN CREEK AND 
WILLOW CREEK AREA. THESE DRAINAGES ARE LOCATED TO THE SOUTH AND 
SOUTHWEST OF ESCALANTE.

IN ADDITION...RAINFALL HAS MOVED THROUGH THE AREA TO THE SOUTH AND 
SOUTHEAST OF THESE WATERSHEDS. FLASH FLOODING IS ANTICIPATED TO 
CONTINUE THROUGH THESE AREAS THROUGH THE LATE EVENING HOURS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3761 11181 3774 11182 3772 11143 3769 11129
      3756 11109 3748 11134 3746 11153 3753 11166

$$

MCINERNEY

850 
WGUS75 KSLC 270314
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
914 PM MDT FRI AUG 26 2011

UTC017-025-270322-
/O.EXP.KSLC.FF.W.0043.000000T0000Z-110827T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-GARFIELD UT-
914 PM MDT FRI AUG 26 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 915 PM MDT FOR SOUTH
CENTRAL GARFIELD AND NORTH CENTRAL KANE COUNTIES...

HEAVY RAIN HAS DIMINISHED ACROSS THE WARNED AREA. HOWEVER...RADAR 
INDICATED THAT 2 TO 3 INCHES OF RAIN FELL OVER THE CANAAN CREEK AND 
WILLOW CREEK AREA SOUTH AND SOUTHWEST OF ESCALANTE EARLIER THIS 
EVENING. WATER LEVELS IN THESE DRAINAGES WILL SLOWLY RECEDE THROUGH 
LATE THIS EVENING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

LAT...LON 3761 11181 3774 11182 3772 11143 3769 11129
      3756 11109 3748 11134 3746 11153 3753 11166

$$

LC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1025 AM MDT FRI AUG 26 2011

.SYNOPSIS...HIGH PRESSURE WILL REMAIN CENTERED NEAR THE FOUR
CORNERS THROUGH THE WEEKEND ALLOWING MOISTURE TO CONTINUE TO
SPREAD INTO THE EASTERN GREAT BASIN.

&&

.DISCUSSION...HIGH PRESSURE REMAINS CENTERED JUST EAST OF THE FOUR
CORNERS REGION...ALLOWING MOISTURE TO ADVANCE NORTHWARD INTO UTAH.
CURRENTLY...THE GOES SOUNDER SHOWS PRECIPITABLE WATER VALUES OF
JUST OVER AN INCH ACROSS SOUTHEASTERN UTAH...JUST BELOW AN INCH
ACROSS CENTRAL UTAH...AND AROUND THREE QUARTERS OF AN INCH ACROSS
NORTHERN UTAH. WITH THIS MOISTURE IN PLACE...TODAY WILL BE QUITE
SIMILAR TO THE PAST FEW DAYS...WITH AFTERNOON CONVECTION
INITIATING OVER THE HIGHER TERRAIN...AND MOVING OVER ADJACENT
VALLEYS. ACROSS SOUTHEASTERN UTAH WHERE THE MOISTURE IS
DEEPEST AND STEERING WINDS ARE LIGHT...THE MAIN THREAT THIS AFTERNOON
WILL BE FLASH FLOODING. MOISTURE ACROSS NORTHERN UTAH IS HIGHER
BASED...AS EVIDENCED BY THE INVERTED V SIGNATURE ON THE 12 SLC
SOUNDING...AND HIGHER DEWPOINT DEPRESSIONS THAN THOSE OBSERVED
ACROSS SOUTHERN UTAH. AS A RESULT...EXPECT THAT THE MAIN THREAT
FROM CONVECTION ACROSS NORTHERN UTAH WILL BE GUSTY WINDS
ASSOCIATED WITH THUNDERSTORMS.

MOISTURE WILL LINGER OVER THE STATE THROUGH MONDAY. THE DEEPEST
MOISTURE WILL SHIFT NORTHWARD...WITH PWS MAXING OUT SATURDAY
AFTERNOON ACROSS NORTHERN UTAH. EXPECT THAT THUNDERSTORM COVERAGE
WILL BE GREATEST STATEWIDE SATURDAY...THOUGH SUFFICIENT MOISTURE
WILL REMAIN THROUGH MONDAY FOR AFTERNOON CONVECTION TO DEVELOP
OVER THE HIGHER TERRAIN SUNDAY AND MONDAY.

BOTH THE GFS AND THE EC SHOW A TROUGH DIGGING INTO THE WESTERN US
MIDWEEK NEXT WEEK. ALTHOUGH THE TWO MODELS DIFFER IN TIMING AND
STRENGTH OF THE DISTURBANCE...THE GENERAL IDEA IS THAT A SYSTEM WILL
CROSS THE GREAT BASIN NEXT WEEK.

UPDATED THE GRIDS TO DECREASE CLOUD COVER AND POPS THROUGH NOON
ACROSS NORTHERN UTAH.

&&

.AVIATION...THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGHOUT THE
DAY. SOUTHERLY WINDS ARE EXPECTED THROUGHOUT THE FORECAST PERIOD
WITH A 20 PERCENT CHANCE OF BECOMING NORTHWEST BETWEEN 22Z AND 02Z.
ISOLATED SHOWERS AND THUNDERSTORMS IN THE VICINITY OF THE TERMINAL
WILL RESULT IN PERIODS OF GUSTY AND/OR ERRATIC WINDS...PRIMARILY
BETWEEN 20Z AND 03Z.

&&

.FIRE WEATHER...HIGH PRESSURE REMAINS SITUATED JUST EAST OF THE
DISTRICT AND WILL REMAIN NEARLY STATIONARY THROUGH EARLY NEXT WEEK.
THE RESULTANT SOUTHERLY FLOW ALOFT WILL KEEP MONSOONAL MOISTURE
ACROSS THE AREA...ALLOWING FOR SCATTERED SHOWERS AND THUNDERSTORMS
TO DEVELOP EACH AFTERNOON AND EVENING...WITH ISOLATED CONVECTION
LINGERING OVERNIGHT. DEEP MOISTURE OVER THE SOUTHERN HALF OF THE
DISTRICT WILL RESULT IN LOCALLY HEAVY RAIN WITH SOME STORMS WHILE
GUSTY WINDS WILL CONTINUE TO BE A CONCERN WITH THE STORMS OVER
NORTHERN UTAH.

THE MINIMUM RELATIVE HUMIDITIES WILL CONTINUE TO CREEP UPWARD ACROSS
WESTERN PORTIONS TODAY SUCH THAT ONLY AREAS FROM ABOUT JUAB COUNTY
NORTHWARD OVER THE WEST DESERT WILL HAVE SUB 15 PERCENT READINGS
THIS AFTERNOON. THIS UPWARD TREND WILL CONTINUE THROUGH SATURDAY AND
THEN DRYING WILL GRADUALLY SET IN BEGINNING SUNDAY OVER THE
NORTHWEST AND THEN WEST CENTRAL LOCATIONS BY TUESDAY. THIS DRYING
TREND COMBINED WITH INCREASINGLY STRONG SOUTHWEST WINDS WILL LIKELY
HEIGHTEN THE FIRE POTENTIAL ACROSS WESTERN UTAH TO THE HIGHEST
LEVELS SO FAR THIS SEASON.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&

PUBLIC...HOSENFELD
FIRE WEATHER...STRUTHWOLF
AVIATION...STRUTHWOLF

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
515 AM MDT FRI AUG 26 2011

UTZ001>016-019>021-517-518-WYZ021-271200-
CACHE VALLEY/UTAH PORTION-NORTHERN WASATCH FRONT-
SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT-
GREAT SALT LAKE DESERT AND MOUNTAINS-WASATCH MOUNTAIN VALLEYS-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS-
WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH-
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
GLEN CANYON RECREATION AREA/LAKE POWELL-CENTRAL MOUNTAINS-
SOUTHERN MOUNTAINS-SOUTHWEST WYOMING-
515 AM MDT FRI AUG 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF
UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

TROPICAL MOISTURE WILL CONTINUE ACROSS THE OUTLOOK AREA THROUGH
TONIGHT. ISOLATED SHOWERS AND THUNDERSTORMS IN THE MORNING ARE
AGAIN EXPECTED TO BECOME MORE NUMEROUS IN THE AFTERNOON AND
CONTINUE INTO TONIGHT. SOME OF THE STORMS ACROSS THE SOUTHERN AND
EASTERN OUTLOOK AREA COULD PRODUCE HEAVY RAIN AND ISOLATED FLASH
FLOODING IS POSSIBLE.

WARM TEMPERATURES FOR LATE AUGUST WILL CONTINUE TODAY...WITH
RECORD HIGHS ONCE AGAIN POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE MOISTURE WILL REMAIN IN PLACE SATURDAY WITH SHOWERS AND
THUNDERSTORMS ONCE AGAIN INCREASING THROUGH THE AFTERNOON AND
EVENING. THESE WILL BRING A THREAT OF HEAVY RAIN TO THE ENTIRE
OUTLOOK AREA.

A MORE WESTERLY FLOW IS EXPECTED TO DEVELOP SUNDAY BUT THE AIRMASS
WILL REMAIN MOIST. A DRYING TREND WILL BEGIN MONDAY AND CONTINUE
INTO MID WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)